On Tue, 7 Oct 2008, Kwan Ting Chan wrote:
Kwan Ting Chan
Chair, the group of people who is attempting to form a new Chapter of
the Wikimedia Foundation in the United Kingdom.
If you want to get finickity about it, "the group of people who are..." is
gramatically better than "the group of people who is..."
That would depend upon whether the trying is being done by the people
or the group :)